A term used to describe the act of getting a female where it hurts such as a man when getting kicked in the genitals. It is a straight leg kick up between her legs. May be used in "cat" fights.
"Sally was being a real b**ch so I bicycle barred her and she never messed with me again."
Katie: "Some lady at the bar last night tried to pick a fight with me and I ran."
Sara: "If that ever happens again you need to look her in the eye and give her the ol' bicycle bar."